Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90f22e7f58f8faf…

MALICIOUS

PDF

74.7 KB Created: 2021-02-22 09:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3534df55331374735130ac2ad92c32fc SHA-1: 9f0b370d5368a70ec5a46b6a7654a0198027ad89 SHA-256: d90f22e7f58f8faf54b38a58ec7b0746cdb9b638b6c00b4cb3a00128e9e88980
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'baarspo.ru', which is a strong indicator of phishing or malware distribution. The PDF structure itself shows signs of manipulation, such as duplicate object bodies, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/123?utm_term=what+is+not+considered+detrimental+conduct PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385617/normal_6016d4ac3f072.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/haBdieW/4_pics_1_song_level_190.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/g7cI62k/wamigoxazabinewokixowose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392664/normal_5fc816ac996a9.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/hdggUyw/12190586869.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/gfiaZjh/jetiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/yaibhb0/worm_snake_zona._io-_master_io_guides.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/eLnhhVN/yellowfin_menu_hernando_ms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470980/normal_5fc9d9753d904.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/WRYXjan/faxetejafebuzitida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493201/normal_5ff27a5be684a.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/Eigjjr7/exploration_lite_craft_mod_apk_1._1._0.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/cibJjgN/foodpanda_hotline_rider.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_602ebe471fa1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://digutir.rf.gd/babimusafuvij.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE820 5192 bytes
SHA-256: 00e2ada5ef9b94837d266f01adce324d54403b61a4935b68e0baa877ab240262
font_01_sfnt_off0000f9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A7 10572 bytes
SHA-256: 1ecc198b3b426b8a7b78e95d9f9c4569dc99928b5b9043c97c021ea548c40fe5